If you’re like a lot of people who work on the web and end up developing, programming, or fiddling with graphics until after dark, then the likelihood is you’re giving your eyes a hard time, and/or the odd headache.

Handy little (free again) tool called flux that adjusts the colour balance of your screen for day and night work automatically – sets up your location for you by typing in your country. Very few options, but very few needed.

And if you need to perform colour-sensitive work you can turn it off for an hour, or disable it.